Oct 8, 2025 · 37m · sourcery
Base Power Raises $1B led by Addition, with Trust Ventures, Lightspeed, a16z, Altimeter, Elad Gil · Sourcery with Molly O'Shea
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gold bands on the timeline = statements, start to end. Hover to read, click to jump. CC turns on captions
In this episode of Sourcery, host Molly O'Shea interviews Base Power Co-Founder and CEO Zach Dell following the announcement of their $1 billion Series C funding round led by Addition. Dell discusses Base Power's mission to revolutionize energy infrastructure through distributed home batteries, high-density engineering talent, and rapid grid deployment to power the future of AI and consumer energy.
How this conversation actually went
Every chapter scored 0–10 on four independent dynamics. Hover any point for the reasoning behind the score. Molly holds 23.7% of the talking time here. How this is scored →
Molly as informed peer 3.7 Guest teaching 3.6 Guest disagreement 1.1 Molly pushing back 0.1
speaking balance: gold is Molly, purple is the guest (3 minute bins)
Sharpest disagreement ▶ 36:07 Thinking in gigawatts, not megawatts
Zach playfully rejects Molly's framing that Base is operating at megawatt scale, asserting that they are already racing toward gigawatt-level deployments.
Hardest push from Molly ▶ 36:44 Regulatory betting restrictionsWhen Zach jokes about betting on a prediction market for Base reaching a gigawatt, Molly pushes back noting insider trading rules would exempt him from trading.
Biggest teaching moment ▶ 24:31 Masterclass on interconnection queue mechanicsZach breaks down the structural grid delays involved in interconnection queues and how Base deploys distributed storage where grid connections already exist.
Molly holds their own ▶ 34:45 Citing Carta Series B-to-C benchmark dataMolly demonstrates market expertise by quoting Carta data showing the median Series B to C timeline is 18 to 24 months, highlighting Base's rare 6-month turnaround.
the scores for every segment, with the reasoning behind each
| Chapter | Topic | Molly as informed peer | Guest teaching | Guest disagreement | Molly pushing back | Why |
|---|---|---|---|---|---|---|
| Announcing Base Power's $1 Billion Series C | 3 | 2 | 1 | 0 | Molly opens the episode celebrating Base Power's massive $1B Series C announcement. Zach Dell explains the momentum, growth metrics, and investor enthusiasm that accelerated their timeline. | |
| Cap Table Strategy & Strategic Investor Syndicate | 4 | 3 | 1 | 0 | Molly asks targeted questions sourced from cap table investors like Elad Gil and Eric at Altimeter. Zach details how strategic investors like Lennar and Starwood align with their long-term infrastructure roadmap. | |
| Company Culture: Chop Wood, Carry Water | 3 | 3 | 1 | 0 | Molly prompts Zach on the company's operational philosophy. Zach describes their 'chop wood, carry water' ethos, highlighting that leadership functions as individual contributors doing hands-on assembly. | |
| Sponsor Spotlight: Brex Financial Platform | 4 | 5 | 1 | 0 | Following an ad read, Molly asks about how Zach and Justin formed their conviction. Zach provides an extensive breakdown of the energy paradigm shift from fossil fuels to solar and battery storage driven purely by cost curves. | |
| Operational Milestones & Aggressive Hiring Roadmap | 3 | 3 | 1 | 0 | Molly inquires about operational milestones and team building. Zach explains their core operational North Stars around deployment speed, low landed cost, and aggressive cross-disciplinary hiring. | |
| Sponsor Spotlight: Turing Intelligence AI Solutions | 4 | 4 | 1 | 0 | Molly reflects on Texas as the emerging capital of energy infrastructure. Zach contrasts the capital intensity and long feedback loops of hard tech manufacturing with the lower-stakes iteration cycles in software. | |
| Solving the AI Energy Bottleneck with Speed to Power | 4 | 6 | 1 | 0 | Molly raises the AI power bottleneck, prompting Zach to deliver a clear tutorial on electricity cost functions and bypassing multi-year interconnection queues with distributed behind-the-meter batteries. | |
| Sponsor Spotlight: Carta Cap Table & Fund Administration | 4 | 5 | 1 | 0 | Molly asks about Base qualifying for the Texas AIDER program and geographic expansion. Zach explains aggregated virtual power plants and identifies high-solar states like California and Arizona as prime targets. | |
| Founder Leadership Principles & Uncompromising Standards | 3 | 3 | 1 | 0 | Molly asks about leadership principles during hypergrowth. Zach emphasizes maintaining an uncompromising hiring bar and fostering a flat culture where junior engineers openly challenge leadership. | |
| The Race to Gigawatts & Future Milestones | 5 | 2 | 2 | 1 | Molly cites Carta benchmark data on fundraising velocity and references the BG2 podcast. When Molly notes Base is thinking in megawatts, Zach playfully corrects that they are thinking in gigawatts. |
Statements from this episode (16)
Dell: Addition is leading a $1B Series C for Base Power
“Addition is leading a billion dollar Series C. A billion dollar Series C. That is correct.”
Dell: Thrive, Valor, and a16z joined Base Power's Series C
“The round is led by Addition. All of our existing major investors are reinvesting. So Thrive, our earliest backer, Valor, who led our Series A, Altimeter, Andreessen Horowitz, Lightspeed, Allad Gill. You know, a number of other firms that have been on the cap …”
Dell: Base Power grows customers 30% MoM with millions in monthly revenue
“We're adding customers on the order of 30% month for a month, doing millions of dollars a month in revenue. We've got a more demand than we can serve. We've got thousands of customers on our waitlist and a multi-month backlog.”
Dell: Homebuilder Lennar has invested in Base Power since seed round
“Lennar has been an investor. They're obviously one of the largest single family home builders in the country. They've been an investor since our seed round.”
Dell: Valor sent staff to Base Power to scale deployment factories
“Valor had a team of people down in our office for a couple of months, helping us work on some of our deployment factory scaling problems in the early days, and they were extremely helpful.”
Dell: Base Power's Leadership Team Is Company's First Five Hires
“If you look at our leadership team, so to speak it's basically the first five people at the company. And so these were the only ICs, right? They weren't like hired managers to go build teams to do the work. Like these people did the work, right?”
Zach Dell: Solar and Storage Will Dominate Energy for 50 Years Due to Cost
“And the way I would describe the paradigm shift very simply is the last five decades of energy have been defined by coal and then natural gas. And the next five decades of energy will be defined by solar and battery storage. And by the way, it has nothing to d…”
Zach Dell: Energy Sector Has the Economy's Least Innovative Companies
“If you look at the energy industry, it is this kind of sad combination of the largest and least innovative companies in the economy. They're not engineering led. They're not tech focused. They're not R and D driven.”
Dell: Base Power built a 200-person team with two recruiters
“We have a two-person talent team that has built this team of 200 people.”
Dell: Close to Half of Base Power Team Relocated to Austin
“I mean, I don't have a number off the top of my head, but I imagine it's close to half of the team has relocated to Austin to join us.”
Dell: US electricity costs increased 2.5x over the past 20 years
“The cost of electricity in, in, in the country has gone up roughly two and a half X for the last 20 years.”
Dell: Base Power will deploy 100 megawatts monthly within a year
“We'll deploy on the order of 20 megawatts this month. You know, we'll do on the order of, you know, a hundred megawatts a month you know, roughly this time next year”
Dell: Adding 100 megawatts of grid batteries takes 2 to 5 years
“If you want to put a hundred megawatts of batteries on the grid today, depending on the state, it's going to take you anywhere from two to five years.”
Dell: Base Power is developing products to accelerate data center power access
“So we're working on products to help data center developers get access to power faster, and we're really excited to bring that to market in the near future.”